How to Use a Laser Jig for Consistent Batch Engravings

When you're making one item, eyeballing the position is fine. When you're making 20 of the same keychain for a market order, it stops working fast. A laser jig fixes the alignment problem permanently. You cut it once, and every blank you run after that lands in the exact same spot.

What a jig actually does

A jig is a physical template, usually cut from cheap 3mm plywood or MDF, with a pocket sized to hold your blank. You place the jig in your laser bed, drop in a blank, run the job, pull out the finished piece, and repeat. The jig stays put. The artwork stays in the same position relative to every blank.

The reason this matters is that laser software positions artwork using coordinates. If your blank shifts 2mm between runs, your engraving shifts 2mm with it. On a single piece that's annoying. On a batch of 50 keychains or coasters, you get 50 slightly different results and you can't sell half of them.

Pocket jigs vs. registration mark jigs

A pocket jig has a cutout the same shape as your blank. The blank drops into the pocket and is physically held in place. This works great for rectangles, circles, and uniform shapes. It's the most reliable setup for batch work.

A registration mark jig uses engraved lines, score marks, or corner stops that you align your blank to visually. It's more flexible for odd shapes but requires more attention between pieces. For anything where you're running more than 10 of the same item, pocket jigs are faster and more consistent.

How to cut your jig

Use material you'd normally toss. 3mm birch plywood or MDF both work. Keep the jig thin so your blank sits at the right focal height. If you stack a 3mm jig under a 6mm blank, the blank surface sits 3mm above the bed. Check that against your machine's focal distance and adjust focus before running.

The pocket dimensions need to account for your laser's kerf. The laser removes material as it cuts, so a pocket drawn at exactly 50mm ends up slightly smaller than 50mm in real life. Run a kerf test first so you know your actual kerf, then build the pocket with that offset. Your blank should drop in with a small amount of play, not require force to seat.

Cut the jig, drop in a spare blank, and check the fit. The blank should sit flat and not rock. If it's too tight, adjust the pocket size and recut. Once the fit is good, tape the jig to your bed or use the same corner reference every session.

Running the batch

Before you run the first real piece, do a frame pass or dry run to confirm the artwork lands exactly where you expect on the blank. Then cut a single test piece on scrap, check the result, and proceed.

The process after that is simple: load a blank, run the job, remove the finished piece, load the next blank. Don't bump the jig. Between every 5 or 10 pieces, do a quick visual check that the jig hasn't shifted from the pressure of loading. A few millimeters of drift is enough to ruin the rest of the batch.

If your software lets you save the job position by coordinates, do it. Next session, restore the saved position, drop in the jig to the same corner of the bed, and you can skip the test run entirely.

When a jig is worth the setup

Jigs pay off when you're making more than 5 to 10 of the same item. They're especially useful when orientation matters. A keychain where the hole needs to be at the top. A coaster with a logo that has to face a specific direction. Earrings that need to match each other exactly.

For a single custom item, skip the jig. Use a simple cardboard guide or your software's position feature instead. The jig is for repeatability, and repeatability only matters when you're repeating something.

Keep your jigs and label them

If you sell the same product at craft fairs or on Etsy, you'll run that batch again in three months. Keep the jig. Label it now with a marker: blank size, material, design name. Store it flat so it doesn't warp. A labeled jig means your next batch starts in five minutes instead of an hour of re-testing.

Pre-made jig templates save you the design work. They're sized for common blank dimensions and come ready to cut. You download the file, cut the jig, test the fit, and you're ready to run.

Jigs feel like extra setup the first time. After your first batch of 30 perfectly aligned keychains with no rework, you'll cut a jig for every repeated product in your shop.